Lenovo USA ThinkPad Workstation Docking Satation With 230w AC Adapter ( Slim Tip ) Included ( p/n; 40A50230US ) Compatible With Select Thinkpad Models Only Lenovo 40A50230US ThinkPad Workstation Dock - USA, Includes the 230w ac adapter. 40A50230US Lenovo Thinkpad Workstation Is Compatible With; P50, P51, P70, P71 / Does NOT Work In The P50S , P51S Or P70S Workstation dock is capable to support up to 4k2k(3840x2160)@60Hz via either 1 of 2 DP ports, or support dual 4k2k@30Hz via 2 DP ports. Actual video output on the dock is based on system video performance since the video signal is passing through from system to the Workstation dock. Features and Benefits: 6x USB 3.0, one supports always-on USB charging, 10/1000 Gigabit Ethernet, supports enterprise manageability, 2x DisplayPort 1.2 ,1x DVI-D ,1x HDMI 1.4, 1x VGA ,1x Stereo/Mic Combo Audio Port , Driver-free, perfect video quality, Security Lock conveniently secures both your notebook and dock to your desk with a single key.